VDB-95075 · CVE-2016-4291 · BID 92325

Hancom Office 2014 Hangul HShow Document integer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Hancom Office 2014. This affects an unknown part of the component Hangul HShow Document Handler. The manipulation leads to integer overflow. This vulnerability is referenced as CVE-2016-4291. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Hancom Office 2014. It has been rated as critical. This issue affects an unknown functionality of the component Hangul HShow Document Handler. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

When opening a Hangul HShow Document (.hpt) and processing a structure within the document, Hancom Office 2014 will use a field from the structure in an operation that can cause the integer to overflow. This result is then used to allocate memory to copy file data in. Due to the lack of bounds checking on the integer, the allocated memory buffer can be made to be undersized at which point the reading of file data will write outside the bounds of the buffer. This can lead to code execution under the context of the application.

The bug was discovered 08/04/2016. The weakness was published 01/06/2017 by Cisco with Cisco Talos (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2016-4291 since 04/27/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 155 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 92325†). Similar entries are available at VDB-95074, VDB-95076 and VDB-95080. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 7.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/27/2016 🔍
08/04/2016 +99 days 🔍
08/04/2016 +0 days 🔍
01/06/2017 +155 days 🔍
01/06/2017 +0 days 🔍
01/07/2017 +1 days 🔍
04/20/2025 +3025 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Cisco
Organization: Cisco Talos
Status: Not defined

CVE: CVE-2016-4291 (🔍)
GCVE (CVE): GCVE-0-2016-4291
GCVE (VulDB): GCVE-100-95075
SecurityFocus: 92325 - Hancom Office 2014 VP Multiple Local Arbitrary Code Execution Vulnerabilities
OSVDB: - CVE-2016-4291 - Hancom - Office - Integer Overflow Issue

See also: 🔍

Entryinfo

Created: 01/07/2017 12:50
Updated: 04/20/2025 09:18
Changes: 01/07/2017 12:50 (60), 07/15/2020 16:06 (6), 04/20/2025 09:18 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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